Make VM TypedList not implement ByteBuffer.

sdk/lib/typed_data/typed_data.dart

Index: sdk/lib/typed_data/typed_data.dart
diff --git a/sdk/lib/typed_data/typed_data.dart b/sdk/lib/typed_data/typed_data.dart
index 9d37eb6830760eb3f83699c60121a9228a7be644..3aa7ce654f73220f9b647c9fc73dc02c655bbe4e 100644
--- a/sdk/lib/typed_data/typed_data.dart
+++ b/sdk/lib/typed_data/typed_data.dart
@@ -12,6 +12,10 @@ import 'dart:math' show Random;
  * A sequence of bytes underlying a typed data object.
  * Used to process large quantities of binary or numerical data
  * more efficiently using a typed view.
+ *
+ * The `ByteBuffer` instances created by this library are the only ones
+ * that will work with the `view` constructors.
+ * Creating a class implementing `ByteBuffer` will not make it usable.
  */
 abstract class ByteBuffer {
   /**
@@ -19,6 +23,15 @@ abstract class ByteBuffer {
    */
   int get lengthInBytes;
 
+  int get hashCode;
+
+  /**
+   * Is [other] a `ByteBuffer` holding the same memory as this.
+   *
+   * A `ByteBuffer` is only equal to another `ByteBuffer` that
+   * represents the same underlying memory.
+   */
+  bool operator==(Object other);
 }
 
 
@@ -44,6 +57,10 @@ abstract class TypedData {
 
   /**
    * Returns the byte buffer associated with this object.
+   *
+   * The returned object represents the underlying memory.
+   * It may be the same object returned each time, or a new object representing
+   * the same memory.
    */
   ByteBuffer get buffer;
 }
@@ -54,8 +71,6 @@ abstract class TypedData {
  * sequence of bytes.
  */
 class Endianness {
-  const Endianness._(this._littleEndian);
-
   static const Endianness BIG_ENDIAN = const Endianness._(false);
   static const Endianness LITTLE_ENDIAN = const Endianness._(true);
   static final Endianness HOST_ENDIAN =
@@ -63,6 +78,8 @@ class Endianness {
     LITTLE_ENDIAN : BIG_ENDIAN;
 
   final bool _littleEndian;
+
+  const Endianness._(this._littleEndian);
 }